The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2026
Filed:
Jun. 03, 2025
Kyocera Document Solutions Inc., Osaka, JP;
Zuishin Jo, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
An image forming apparatus includes an image carrier, a charging roller, an exposure device, and a developing device. The image carrier includes a conductive substrate, an intermediate layer, and a photosensitive layer. The photosensitive layer includes an electric charge generation layer and an electric charge transport layer stacked on a surface of the electric charge generation layer, and the electric charge transport layer contains an antioxidant expressed by a general formula (1) below. In the formula (1), Rrepresents an alkyl group having 1 to 10 carbon atoms or a general formula (2) below in which Rrepresents an alkyl group having 1 to 10 carbon atoms. The charging roller has a resistance value in a range of 2×10to 2×10[Ω] when a DC voltage of 500 V is applied thereto under an environment of 10° C. and 10% RH.